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| Patents for John A. Barker | |||||
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| Number | Date | Patentee | Title | Type | |
| 495,577 | Apr. 18, 1893 | J.A. Barker | Wrench | quick adjust wrenches | |
| 574,513 | Jan. 05, 1897 | J.A. Barker | Wrench | screw adjust wrenches | |